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| Type | Number of exam questions | Exam name | Exam code | Last updated |
| Free | 15 | Microsoft Azure IoT Developer | AZ-220 | AZ-220 dumps |
Question 1:
DRAG DROP
You deploy an Azure IoT hub.
You need to demonstrate that the IoT hub can receive messages from a device.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
Correct Answer:
Question 2:
DRAG DROP
You have an Azure IoT hub.
You plan to attach three types of IoT devices as shown in the following table.
You need to select the appropriate communication protocol for each device.
What should you select? To answer, drag the appropriate protocols to the correct devices. Each protocol may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Select and Place:
Correct Answer:
Question 3:
DRAG DROP
You have an Azure IoT Central application that includes a Device Provisioning Service instance.
You need to connect IoT devices to the application without first registering the devices.
In which order should you perform the actions? To answer, move all actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
Correct Answer:
Step: With DPS (Device Provisioning Service) you can generate device credentials and configure the devices offline without registering the devices through IoT Central UI. Connect devices that use SAS tokens without registering
1.
Copy the IoT Central application\’s group primary key
2.
Use the dps-keygen tool to generate the device SAS keys. Use the group primary key from the previous step. The device IDs must be lower-case: dps-keygen -mk: -di:
3.
The OEM flashes each device with a device ID, a generated device SAS key, and the application ID scope value.
4.
When you switch on a device, it first connects to DPS to retrieve its IoT Central registration information.
The device initially has a device status Unassociated on the Devices page and isn’t assigned to a device template. On the Devices page, Migrate the device to the appropriate device template. Device provisioning is now complete, the device
status is now Provisioned, and the device can start sending data.
On the Administration > Device connection page, the Auto Approve option controls whether you need to manually approve the device before it can start sending data.
Reference:
https://docs.microsoft.com/en-us/azure/iot-central/core/concepts-get-connected
Question 4:
DRAG DROP
You have an instance of Azure Time Series Insights and an Azure IoT hub that receives streaming telemetry from IoT devices.
You need to configure Time Series Insights to receive telemetry from the devices.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
Correct Answer:
Step 1: Create a dedicated consumer group…
Add a consumer group to your IoT hub.
Applications use consumer groups to pull data from Azure IoT Hub. To reliably read data from your IoT hub, provide a dedicated consumer group that\’s used only by this Time Series Insights environment.
Step 2: Add a new Time Series Insights event source.
Add a new event source
Sign in to the Azure portal.
In the left menu, select All Resources. Select your Time Series Insights environment.
Under Settings, select Event Sources, and then select Add.
In the New event source pane, for Event source name, enter a name that\’s unique to this Time Series Insights environment. For example, enter event-stream.
Step 3: Configure the Time Series event source to connect to an existing IOT hub
Step 4: For Source, select IoT Hub.
Step 5: Select a value for the Import option:
If you already have an IoT hub in one of your subscriptions, select Use IoT Hub from available subscriptions. This option is the easiest approach.
Reference:
Question 5:
DRAG DROP
You have an Azure IoT solution that includes an Azure IoT hub.
You receive a root certification authority (CA) certificate from the security department at your company.
You need to configure the IoT hub to use the root CA certificate.
Which four actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
Correct Answer:
Reference: https://docs.microsoft.com/bs-latn-ba/azure/iot-hub/iot-hub-security-x509-get-started
Question 6:
DRAG DROP
You have an Azure IoT solution that includes an Azure IoT hub, a Device Provisioning Service instance, and 1,000 connected IoT devices. The IoT devices are allocated to tour enrollment groups. Each enrollment group is configured to use
certificate attestation.
You need to decommission all the devices in a single enrollment group and the enrollment group itself.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
Correct Answer:
To deprovision all of the devices that have been provisioned through an enrollment group:
Disable the enrollment group to disallow its signing certificate.
Use the list of provisioned devices for that enrollment group to disable or delete each device from the identity registry of its respective IoT hub.
After disabling or deleting all devices from their respective IoT hubs, you can optionally delete the enrollment group. Be aware, though, that, if you delete the enrollment group and there is an enabled enrollment group for a signing certificate
higher up in the certificate chain of one or more of the devices, those devices can re-enroll.
Reference:
https://docs.microsoft.com/en-us/azure/iot-dps/how-to-unprovision-devices
Question 7:
DRAG DROP
You have an Azure IoT Edge solution.
You plan to deploy an Azure Security Center for IoT security agents. You need to configure the security agent to meet the following requirements:
Connection events must be reported as a high priority.
High-priority events must be collected every seven minutes.
How should you configure the azureiotsecurity module twin? To answer, drag the appropriate values to the correct locations. Each value may be used once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.
NOTE: Each correct selection is worth one point.
Select and Place:
Correct Answer:
Box 1: “desired”: {
To configure connection events as high priority and collect high priority events every 7 minutes, use the following configuration.
“desired”: { “ms_iotn:urn_azureiot_Security_SecurityAgentConfiguration”: { “highPriorityMessageFrequency”: {
“value”: “PT7M”
},
“eventPriorityConnectionCreate”: {
“value”: “High”
}
Box 2: “highPriorityMessageFrequency “: {
Box 3: “eventPriorityConnectionCreate”: {
Reference: https://docs.microsoft.com/en-us/azure/defender-for-iot/how-to-agent-configuration
Question 8:
HOTSPOT
You have the following device twin for the IoT device.
For each of the following statements, select Yes if the statement is true. Otherwise, select No. NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Box1: Yes
Box 2: Yes
Fanspeed 73 is a reported property.
Box 3: No
The deviceID property is read-only.
Reference:
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-device-twins
Question 9:
HOTSPOT
You create an Azure Stream Analytics job that has the following query.
The job is configured to have an Azure IoT Hub input and an output to an Azure function.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Question 10:
HOTSPOT
You are planning a proof of concept (POC) that will use an Azure IoT hub.
You have two self-signed client authentication certificates named Cert1 and Cert2. Cert1 has a basic constraint that contains Subject Type=CA. Cert2 has a basic constraint that contains Subject Type=End Entity.
You need to identify which certificates to use.
What should you identify? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Box 1: Cert2 only Cert2: The leaf certificate, or end-entity certificate, identifies the certificate holder. It has the root certificate in its certificate chain as well as zero or more intermediate certificates. The leaf certificate is not used to sign any other certificates. It uniquely identifies the device to the provisioning service and is sometimes referred to as the device certificate.
Box 2: Cert1 only Cert1: A root certificate is a self-signed X.509 certificate representing a certificate authority (CA). It is the terminus, or trust anchor, of the certificate chain. Root certificates can be self-issued by an organization or purchased from a root certificate authority.
Reference: https://docs.microsoft.com/en-us/azure/iot-dps/concepts-x509-attestation
Question 11:
HOTSPOT
You have an Azure IoT hub named Hub1 and an Azure Time Series Insights environment named tsi1. Tsi1 connects to Hub1. The solution has been operational for 6 months.
Tsi1 is configured as shown in the following exhibit.
Hub1 receives 1 million messages per day. Each message is up to 1 KB and is formatted as JSON.
Hub1 has seven days of retained telemetry.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Reference: https://docs.microsoft.com/en-us/azure/time-series-insights/time-series-insights-overview
Question 12:
HOTSPOT
You need to configure Azure IoT Edge module routing to ensure that modules route traffic as shown in the following exhibit.
How should you complete the IoT Edge module routes? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Question 13:
HOTSPOT
You have an Azure subscription that contains an Azure IoT hub, an Azure IoT Edge gateway, and 1,000 leaf devices. The leaf devices use a custom communication protocol that is NOT supported by the IoT hub.
You need to configure the gateway to meet the following requirements:
Minimize the number of connections between the gateway and the IoT hub.
Support addressing cloud-to-device messages to individual leaf devices.
How should you configure the gateway? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Explanation:
Box 1: Protocol translation
In the protocol translation gateway pattern, only the IoT Edge gateway has an identity with IoT Hub. The translation module receives messages from downstream devices, translates them into a supported protocol, and then the IoT Edge device sends messages on behalf of the downstream devices.
Box 2: Advanced MessageQueuing Protocol (AMQP)
Connection multiplexing – All devices connecting to IoT Hub through an IoT Edge gateway can use the same underlying connection. This multiplexing capability requires that the IoT Edge gateway uses AMQP as its upstream protocol.
Reference:
https://docs.microsoft.com/en-us/azure/iot-edge/iot-edge-as-gateway
Question 14:
HOTSPOT
You have an Azure subscription that contains an Azure IoT hub and two IoT devices named Device1 and Device2.
You plan to deploy an Azure IoT Edge gateway device named Gateway1.
You need to ensure that all device-to-cloud messages and twin change notifications from Device1 and Device2 to the IoT hub are routed by using Gateway1.
What tasks should you perform to configure the devices? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Box 1: Device1 and Device2
Connection strings for downstream devices need the following components:
The gateway device that the device connects through. Provide the hostname value from the IoT Edge gateway device\’s config file: GatewayHostName={gateway hostname}
Box 2: Gateway1
To deploy the IoT Edge hub module and configure it with routes to handle incoming messages from downstream devices, follow these steps:
In the Azure portal, navigate to your IoT hub.
Go to IoT Edge and select your IoT Edge device that you want to use as a gateway.
Select Set Modules.
On the Modules page, you can add any modules you want to deploy to the gateway device.
Select Next: Routes.
On the Routes page, make sure that there is a route to handle messages coming from downstream devices. For example:
A route that sends all messages, whether from a module or from a downstream device, to IoT Hub: Name: allMessagesToHub Value: FROM /messages/* INTO $upstream
Box 3: FROM /messages/* INTO $upstream
Reference: https://docs.microsoft.com/en-us/azure/iot-edge/how-to-authenticate-downstream-device
Question 15:
DRAG DROP
You have an Azure subscription that contains an Azure IoT hub and 100 IoT devices.
The devices connect to the IoT hub by using the Advanced Message Queuing Protocol (AMQP) protocol and authenticate to the IoT hub by using symmetric keys.
You need to configure the SASL PLAIN username for the AMQP connection.
How should you configure the username? To answer, drag the appropriate options to the correct targets. Each option may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Select and Place:
Correct Answer:
Box 1: DeviceID
If you use AMQP claims-based security, the standard specifies how to transmit these tokens.
For SASL PLAIN, the username can be:
{policyName}@sas.root.{iothubName} if using IoT hub-level tokens.
{deviceId}@sas.{iothubname} if using device-scoped tokens.
Box 2: sas
Box 3:IoT hub hame
Reference:
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-dev-guide-sas
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